# lane-icons research

Source: <https://github.com/openstreetmap/lane-icons>, inspected 2026-08-04.

## Provenance

- Owner: `openstreetmap` GitHub organization.
- Repository tree revision: `db3cab321da93a757c2cf3cdb4f1f1db6b1a091c` (`master`).
- License: `LICENSE.md` is CC0 1.0 Universal. Keep that text adjacent to any
  vendored source assets.

## Relevant Contents

- `docs/through.svg`
- `docs/left.svg`
- `docs/left-through.svg`
- `docs/slight_left.svg`
- `docs/slight_left-through.svg`
- `docs/sharp_left.svg`
- `docs/sharp_left-through.svg`
- `docs/reverse_left.svg`
- `docs/reverse_left-through.svg`
- `docs/reverse_left-left-slight_left-through.svg`
- `docs/left-slight_left-through.svg`

## Design Rules

`DESIGN.md` bases arrows on the MUTCD Standard Arrow. It specifies a shared
shaft for compound arrows, smooth curves, aligned arrow bottoms, and reduced
arrowhead scale as the number of directions grows. The upstream SVGs are
single-color and stroke-free; our existing render layer supplies the project
fill and outline treatment.

## Adoption Decision

Vendor all listed arrow SVGs with provenance and CC0 license text. The
production mapping is initially restricted to `through`, `left`, `right`,
`through;left`, and `through;right`. Right-side variants are deterministic
mirrors of upstream left-side assets. Every other vendored arrow remains
explicitly untested and unavailable to the production mapper.